Home / 142,221.16-196,252.50-81,775.72

Finding the Fourth Proportional to 142,221.16, 196,252.50 and 81,775.72

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Solution

The fourth proportional to 142,221.16, 196,252.50 and 81,775.72 is: 112,843.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,221.16 : 196,252.50 = 81,775.72 : x
  2. Step 2: Convert to fraction form
    142,221.16/196,252.50 = 81,775.72/x
  3. Step 3: Cross multiply
    142,221.16x = 196,252.50 × 81,775.72
  4. Step 4: Simplify right side
    142,221.16x = 16,048,689,489.30
  5. Step 5: Solve for x
    x = 16,048,689,489.30/142,221.16
  6. Step 6: Final answer
    x = 112,843.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.